Product Description The Timber Creek Outdoors TCCN TCO Steel Castle Nut is a Mil-Spec component designed for use with AR-15 carbine receiver extensions. Made from steel with a black finish, it provides a secure, durable interface for your AR-platform buffer tube assembly and is well-suited for new builds or replacement parts. Product Highlights Mil-Spec steel castle nut designed for AR-15 carbine receiver extensions Durable steel construction for dependable performance in AR-platform builds Black finish to match common AR hardware and complete a clean build look Ideal replacement or upgrade part for AR-15 buffer tube/receiver extension assemblies Proudly made in the U.S.A. Specs Brand: TIMBER CREEK OUTDOOR INC Product Type: Castle Nut Model/MPN: TCCN Material: Steel Color/Finish: Black Compatibility: AR-15 carbine receiver extensions (AR platform) UPC: 816397026864 Country of Manufacture: USA Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.